CHAPTER 7 HEAT EXCHANGER TEST
1. Fouling resistance is determined by all of the following except:
a. type of fluid being handled
b. amount of suspended solids
c. tube and shell pressure rating
d. velocity of fluid stream
2. A device mounted on the inlet side of a shell and tube heat exchanger that is used to
channel flow in a multipass heat exchanger.
a. head
b. longitudinal baffle
c. sectional head
d. channel head
3. Laminar flow transfers heat more effectively than turbulent flow inside a heat
exchanger.
a. true
b. false
4. Internal buildup on the surface area of a heat exchanger that results in a restriction is
referred to as:
a. plugging
b. fouling
c. scale
d. purging
5. A type of heat exchanger that channels the tube-side flow across the tube bundle more
than once.
a. multi-pass
b. u-tube
c. a & b
d. floating head
e. a & b & d
6. What is the name of the metal plates located inside a shell and tube heat exchanger that
are designed to increase turbulent flow and reduce hotspots.
a. vertical baffles
b. impingement baffle
c. longitudinal baffles
d. a & c
a. a & b & c
7. All of the following are examples of heat transfer found in a heat exchanger except:
a. convection
b. conduction
c. sensible
d. radiant
8. List the parts of a floating head heat exchanger.
8-1__________ 8-2__________ 8-3__________ 8-4__________
8-5__________ 8-6__________ 8-7__________ 8-8__________
8-9__________ 8-10__________ 8-11__________ 8-12__________
8-13__________ 8-14__________ 8-15__________ 8-16__________
9. A term used to describe flow in a heat exchanger where tube-side flow and shell-side
flow go in opposite directions.
a. cross flow
b. horizontal flow
c. parallel flow
d. counter flow
10. On a simple shell and tube heat exchanger a process technician would close which of the
following valves first.
a. tube inlet valve #1- process fluid 125 F
b. tube outlet valve #2- process fluid 325 F
c. shell inlet valve #3- steam
d. shell outlet valve #4- steam
11. On a simple shell and tube heat exchanger a process technician would turn the device into
a bomb if he closed which of the following valves first.
a. tube inlet valve #1- process fluid 125 F
b. tube outlet valve #2- process fluid 325 F
c. shell inlet valve #3- steam
d. shell outlet valve #4- steam
12. The difference between inlet and outlet pressures is commonly referred to as:
a. differential pressure
b. approach to the exchanger
c. ∆ P (delta P)
d. a & c
13. A term used to describe flow in a heat exchanger where tube-side flow and shell-side
flow go in the same directions.
a. cross flow
b. horizontal flow
c. parallel flow
d. counter flow
14. Plate and frame heat exchangers tend to foul easily because they have close clearances
and low pressure drops across the plates.
a. true
b. false
15. Plate and frame heat exchangers are easy to clean and have high heat transfer
coefficients.
a. true
b. false
16. A term used to describe flow in a heat exchanger where shell-side flow vertically crosses
the horizontal tube flow.
a. cross flow
b. horizontal flow
c. parallel flow
d. counter flow
17. Identify the major components of a kettle reboiler.
17-1__________ 17-2__________ 17-3__________ 17-4__________
17-5__________ 17-6__________ 17-7__________ 17-8__________
17-9__________ 17-10__________ 17-11__________ 17-12__________
17-13_________ 17-14__________ 17-15__________ 17-16__________
18 Sudden temperature changes that results in the rapid expansion or contraction of metal.
a. thermal shock
b. fluid dynamics
c. warping
d. hydraulics
19. A baffle that is designed to deflect high velocity fluids inside a heat exchanger.
a. longitudinal baffle
b. horizontal baffles
c. vertical baffles
d. impingement baffles
20. A fin fan is an example of:
a. air cooled heat exchanger
b. water cooled heat exchanger
c. fin tube double-pipe
d. thermosiphon
21. A type of heat exchanger that uses a tubular bundle to heat and flash a liquid in an over-
sized shell with a vapor disengaging cavity.
a. kettle
b. thermosiphon
c. pot belly reboiler
d. a & c
22. The tub head on a floating head heat exchanger is firmly attached to the tube sheet.
a. true
b. false
23. Draw the simplest type of heat exchanger with the most efficient fluid flow design:
24. Inside a tube with streamline fluid flow temperatures are relatively constant.
a. true
b. false
25. The heat exchanger that is designed to take the highest flow rates and largest temperature
differences is:
a. u-tube
b. plate and frame
c. double-pipe
d. fixed heads, multipass
26. Draw a single-pass, shell and tube heat exchanger. Identify each component!
27. Draw a U-tube heat exchanger. Do not list parts. Show flows
28. A process technician can reduce fouling in a heat exchanger by: Circle all that apply!
a. increasing fluid velocity
b. decreasing fluid velocity
c. lowering the temperature
d. increasing the temperature
e. removing inhibitors
f. adding inhibitors
29. Draw the symbol for one cooling tower and four exchangers in parallel and series flow.
Do not list components.
30. Hairpin heat exchangers are typically as effective as most shell and tube heat
exchangers.
a. true
b. false
31. The basic components of a plate and frame heat exchanger include all of the following
except:
a. carrying bar f. plate pack
b. moveable end cover g. hot fluid inlet
c. tube bundle sheet h. hot fluid outlet
d. plate stack i. fixed end plate
e. compression bolt j. frame head
32. A layer of fluid that tends to adhere to the walls of a heat exchanger is referred to as:
a. laminar adhesion
b. static film
c. crystallization
d. slack
33. Heat exchanger effectiveness is linked to all of the following except:
a. cross sectional area
b. ∆p
c. flow rate
d. differential temperature
e. electromagnetic wave intensity
34. Turbulent flow allows molecules of fluid to mix and absorb heat energy better than
laminar but it enhances the stationary film along the shell and tube walls.
a. true
b. false
35. Fins are added to tubes because:
a. thin material transfers heat better
b. fins create turbulence
c. fins enhance laminar flow
d. a & b
36. Shell and tube nomenclature includes all of the following except:
a. cross flow
b. parallel
c. section
d. counter
e. divided
f. split
37. A hairpin heat exchanger is an example of:
a. shell and tube heat exchanger
b. reboiler
c. double pipe
d. fin fan
38. Heat exchangers can be found in all of the following categories except:
a. double-pipe
b. shell and tube
c. reboiler
d. plate and frame
e. air cooled
f. spiral
g. plate and packed
39. Hairpin heat exchangers are relatively easy to clean and install.
a. true
b. false
40. A shell and tube heat exchanger can be used to heat and cool a substance.
a. true
b. false
41. Draw a plate and frame heat exchanger. Identify each component! Show all flows!
42. Draw an air-cooled (fin fan )heat exchanger. Identify each component. Show all flows!
Answer Key Chapter 7 Heat Exchangers